PLEASE JUST RE TYPE THIS IN THE CHAT I DON'T WANT IT HAND WRITTEN JUST TYPE IT PLEASE THE SAME EXACT WAY ITS VERY VERY VERY EASY, THANK YOU.

The average speed is NOT 80 km/h. Since the two distances traveled were the same, the times of travel were unequal. The time to travel from A to B at 70 km} h is longer than the time to travel from B to C at 90 km/h. Thus we cannot simply average the speed numbers. To find the average speed, we need to calculate (total distance)/ (total time). We assume the distance from A to B and the distance from B to C are both C! km. The time to travel a distance d with a speed v is t = d/v. V = (dav + dbc)/(tab + the) = (d + d)/ (d/70 + d/QO) V=78.75km/hr